overdrive box

[rock649]

This guy was tellin me that there is an overdrive unit that attaches to the end of your tranny...anyone ever hear of this nonsense?

[Kubla]

Yes, they exist, not exactly cheap

[nat_ster]

However they are not made in a size needed for a bus.

Overdrive units that bolt to a transmission are a waste of time.

You better off swapping rear gears, and or the entire transmission.

Anything Gear Vendors is going to cost more than most of us paid for our buses.

Entire transmissions can be had for $200 to $2000.

Rear gear sets run around $200 to $1200 for a entire rear axle.

Nat

[rock649]

Hmmm....well I have to figure out what rear gears I have now first I guess.
I'm not too crazy about throwing away a perfectly good tranny.
Have any of you thrown an electric splitter rear end on a bus before?

[Kubla]

take your VIN number to the nearest international dealer, the service dept can print out a sheet with all the specs on your bus

[rock649]

I will do that

[nat_ster]

Originally Posted by rock649

Have any of you thrown an electric splitter rear end on a bus before?

If you can find that one in 1000, it would work fine

99% of the two speed rear axles have a low speed gear set, and a real low gear set.

They were made for getting big heavy grain truck across the soft fields.

On the roads, the loaded grain trucks would only do 80kmh at best due to the shear weight.

Nat

[Booyah45828]

Something that has yet to be mentioned is the old brown lipe auxiliary boxes. They're all older and were used on heavier vehicles. I've never seen one though so don't count on finding one.
As said before, gear the rear axle to the top speed you desire.

[nat_ster]

Brownie boxes still require drive shaft mods, fabbing new brackets, support members, and shift linkages.

They also weigh 500 to 1500 pounds.

Proper trans and rear gears are hard to beat.

Nat